News

Meet The Smart Contact Lenses Powered By Tears

Researchers in Singapore have revolutionized the humble contact lens with self-charging smart capabilities.

Published

1 year ago

October 30, 2023

Nour Nasir

meet the smart contact lenses powered by tears

NTU Singapore

Contact lenses have been used to successfully correct vision for decades, but recently, they’re beginning to evolve into something much more interesting.

Researchers from the Nanyang Technological University (NTU) in Singapore have developed a tiny micrometer-thin battery that can power futuristic smart contact lenses that rely on the wearer’s tears for power.

Although smart contacts are nothing new, most attempts so far have relied on thin batteries with tiny induction coils and wires. Obviously, these metal parts aren’t ideal for a device that sits directly on the wearer’s eye, so an NTU School of Electrical and Electronic Engineering (EEE) research team led by Lee Seok Woo has been working on something better.

According to a press release, the NTU team’s battery uses biocompatible materials coated with a glucose-based layer. The coating reacts with the sodium and chloride ions present in the battery to generate electricity. Since both sodium and chloride ions are also found in tears, the smart lens battery can also be recharged while in use with no additional effort from the wearer.

Speaking about the research, Lee Seok Woo said, “This research began with a simple question: Could contact lens batteries be recharged with our tears? Previous techniques for lens batteries were imperfect, as one side of the battery electrode was charged, and the other was not. Our approach can charge both electrodes of a battery through a unique combination of enzymatic reaction and self-reduction reaction”.

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According to the NTU team, the lenses should be good for a full day of use, and can also be placed in a special solution that keeps the battery charged. “By combining the battery and biofuel cell into a single component, the battery can charge itself without the need for additional space for wired or wireless components. Furthermore, the electrodes placed at the outer side of the smart contact lenses ensure that the eye’s vision cannot be obstructed”.

The NTU scientists are already working on boosting the amount of electricity the lens battery can deliver. Their research has been published in the journal Nano Energy, and they’re also in the process of partnering with contact lens producers to bring the technology to the market.

News

Viasat Satellite Messaging Tech Showcased In Saudi Arabia

The direct-to-device (D2D) demonstration highlighted the technology’s potential to revolutionize remote communication.

Published

3 days ago

November 28, 2024

Nour Nasir

viasat satellite messaging tech showcased in saudi arabia

Satellite communications firm Viasat announced yesterday that it had completed its first demonstration of direct-to-device (D2D) satellite connectivity technology in Saudi Arabia. The live broadcast took place during the “Connecting the World from the Skies” event in Riyadh, organized by Saudi Arabia’s Communications, Space & Technology Commission (CST) alongside the International Telecommunication Union (ITU).

Attendees witnessed successful satellite-based two-way messaging and SOS alerts sent using commercial Android smartphones and a combination of Viasat’s robust L-band satellite network and the Bullitt over-the-top messaging app. Signals were transmitted using the company’s L-band spacecraft positioned over the Indian Ocean, while the infrastructure for 3GPP NTN services was deployed by Viasat’s partner Skylo.

Sandeep Moorthy, Viasat’s Chief Technical Officer, emphasized the significance of the demonstration, explaining, “By expanding our direct-to-device innovation to the Kingdom of Saudi Arabia, we’re showcasing the potential for D2D services in the fast-growing Gulf and Asia-Pacific region. D2D could help reduce barriers to connectivity in regions where terrestrial services are spotty and unavailable to help transform industries and supply chains, enable new opportunities, and to become more efficient, sustainable and safer. We’d like to thank the CST for their support in carrying out this exciting demonstration”.

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D2D technology allows devices like smartphones, vehicles, and industrial equipment to connect seamlessly to both satellite and terrestrial networks. Unlike traditional satellite setups, D2D eliminates the need for extra hardware, thanks to emerging global standards that are gaining traction among satellite operators, mobile network providers, and tech manufacturers.

What makes this approach particularly promising is that Viasat uses a licensed, dedicated satellite spectrum to deliver its D2D services. This avoids any interference with existing terrestrial networks, allowing smooth integration with mobile network operators in the future.

The demonstration clearly showed the potential of D2D technology to bridge connectivity gaps in remote regions while opening up opportunities for innovation, improved safety, sustainability, and efficiency.